21151815

素因数分解:

$3^1\times 5^1\times {\mathrm{1129}}^1\times {\mathrm{1249}}^1$

素因数の和:2386

約数の個数: 16

約数和(自身を含む): 33900000

約数和(自身を除く): 12748185

約数列:

[1, 3, 5, 15, 1129, 1249, 3387, 3747, 5645, 6245, 16935, 18735, 1410121, 4230363, 7050605, 21151815]

約数ペア:

[(1, 21151815), (3, 7050605), (5, 4230363), (15, 1410121), (1129, 18735), (1249, 16935), (3387, 6245), (3747, 5645)]